Over the years, I have learned quite a bit about camp cooking by watching various historic reenactment groups. The one I have been the most interested in were ones that involved the westward movement in the United States. The cooking methods that they used were quite sophisticated and well developed. Where possible they use Dutch ovens and set up nice camp kitchens.

A camp kitchen that would be used by a large group. Note the Dutch ovens and the spit.

Since they often traveled by wagon or with packhorses, their kitchens ran to the heavy size. But they used almost the same camp kitchen in many of their homes since they frequently cooked outside.

A raised fire, with a spit and hanging pot.

Dutch ovens and cast iron fry pans were some of their main cooking utensils. Now I realize that you are not going to use these in your bug out bag. However, in a fixed location you can set up a nice camp kitchen for outdoor cooking during the hot summer months. The same utensils can be used in the winter but in a more sheltered spot depending on the climate in which you reside.